:root{color-scheme:light dark;--bg:#f4f1ea;--surface:rgba(255,255,255,.74);--text:#171714;--muted:#6d6a62;--line:rgba(23,23,20,.12);--accent:#33473d;--soft:#dce5df;--max:1120px}
@media(prefers-color-scheme:dark){:root{--bg:#121310;--surface:rgba(28,30,26,.8);--text:#f3f0e8;--muted:#aaa79e;--line:rgba(255,255,255,.12);--accent:#c9d9cf;--soft:#26332d}}
*{box-sizing:border-box}body{margin:0;background:radial-gradient(circle at 80% -10%,rgba(95,120,105,.14),transparent 34rem),var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"PingFang TC","Noto Sans TC","Segoe UI",sans-serif;line-height:1.6}a{color:inherit;text-decoration:none}.wrap{width:min(calc(100% - 40px),var(--max));margin:auto}.top{position:sticky;top:0;z-index:10;backdrop-filter:blur(18px);border-bottom:1px solid var(--line);background:color-mix(in srgb,var(--bg) 84%,transparent)}.nav{height:68px;display:flex;align-items:center;gap:18px}.brand{font-weight:750;display:flex;align-items:center;gap:10px}.mark{width:32px;height:32px;border-radius:10px;background:var(--text);color:var(--bg);display:grid;place-items:center;font-weight:800}.links{margin-left:auto;display:flex;gap:18px;color:var(--muted);font-size:14px}.hero{padding:96px 0 56px}.eyebrow{font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);font-weight:700}h1,h2,h3{line-height:1.08;letter-spacing:-.04em;margin:0}h1{font-size:clamp(48px,8vw,92px);max-width:960px}h2{font-size:clamp(32px,5vw,54px)}h3{font-size:22px}.lede{font-size:clamp(19px,2.6vw,25px);color:var(--muted);max-width:760px;margin:26px 0}.btn{display:inline-flex;min-height:48px;align-items:center;padding:0 18px;border-radius:14px;border:1px solid var(--line);font-weight:700}.btn.primary{background:var(--text);color:var(--bg);border-color:transparent}.section{padding:58px 0}.copy{max-width:720px;color:var(--muted);font-size:18px;margin-top:18px}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:34px}.card{background:var(--surface);border:1px solid var(--line);border-radius:26px;padding:28px}.card p{color:var(--muted)}.notice{margin-top:28px;padding:18px;border-radius:18px;background:var(--soft);border:1px solid var(--line)}.prose{max-width:820px}.prose h2{font-size:30px;margin-top:44px}.prose p,.prose li{color:var(--muted)}.footer{border-top:1px solid var(--line);margin-top:56px;padding:34px 0 48px;color:var(--muted);font-size:13px}.footer-row{display:flex;gap:20px;flex-wrap:wrap}.footer-row .right{margin-left:auto}.small{font-size:13px;color:var(--muted)}code{background:var(--surface);padding:.15em .35em;border-radius:6px}
@media(max-width:820px){.grid{grid-template-columns:1fr}.links a:first-child{display:none}.hero{padding-top:70px}}@media(max-width:520px){.wrap{width:min(calc(100% - 28px),var(--max));}.links{gap:10px}}

.prose h1{font-size:clamp(46px,7vw,78px)}
.prose h1 .small{letter-spacing:normal;font-weight:400;line-height:1.6}